2nd time slave cylinder nuked! why?
09-18-2006, 09:57 AM
#1
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2nd time slave cylinder nuked! why? car: 2001 z28 m6
100,xxx miles
bolt on 360rwhp
drivetrain:
factory clutch (still does not slip and engages fine)
factory hydraulics
here is the situation. About one year ago around the 85,xxx mark. My slave cylinder started to leak. So I replaced it. Upon replacement I saw that the throw out bearing and slave was destroyed, parts from both flew around the bell-housing leaving small holes in the bellhousing.
Well I replaced the slave cylinder, bled that system and everything worked great until now, a year later.
I have again heard a couple of noises from the bellhousing, but the car has still been drivable and nothing was leaking.
Well this weekend I drain out all of the hydraulic fluid, performed the "drill mod", and also wrapped the braided hose from the master to the slave with heat wrap. (The LT headers where gettting the fluid too hot).
So now I finish things up, fill the car up with hydraulic fluid and bleed the system with one of my friends. Well an hour after bleeding and I still dont have a clutch pedal.
so i have two questions:
how long can it take to bleed the system? (manual way with, depress clutch, bleed-tighten, release clutch. repeat process)
secondly. assuming that my slave is again shot, (which i am) what could be causing this?
in ex: maybe a bent finger on the pressure plate ripping apart the throw out bearing.
100,xxx miles
bolt on 360rwhp
drivetrain:
factory clutch (still does not slip and engages fine)
factory hydraulics
here is the situation. About one year ago around the 85,xxx mark. My slave cylinder started to leak. So I replaced it. Upon replacement I saw that the throw out bearing and slave was destroyed, parts from both flew around the bell-housing leaving small holes in the bellhousing.
Well I replaced the slave cylinder, bled that system and everything worked great until now, a year later.
I have again heard a couple of noises from the bellhousing, but the car has still been drivable and nothing was leaking.
Well this weekend I drain out all of the hydraulic fluid, performed the "drill mod", and also wrapped the braided hose from the master to the slave with heat wrap. (The LT headers where gettting the fluid too hot).
So now I finish things up, fill the car up with hydraulic fluid and bleed the system with one of my friends. Well an hour after bleeding and I still dont have a clutch pedal.
so i have two questions:
how long can it take to bleed the system? (manual way with, depress clutch, bleed-tighten, release clutch. repeat process)
secondly. assuming that my slave is again shot, (which i am) what could be causing this?
in ex: maybe a bent finger on the pressure plate ripping apart the throw out bearing.
09-18-2006, 10:20 AM
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It takes a while.
I replaced the master and slave this weekend.....
Using the mitivac it took about 2 hours
Here's what I did.....it works....but takes time....be patient...it takes longer than bleeding brakes.
fill tank...
put in pump with attachment...
Pump up to 20hg...
Walk away for about 5 minutes.
Pump pedal very slowly twice...
Release pressure from pump....remove then reinsert....pump back up to 20hg....
Walk away for about 5 minutes....
Repeat...
You get the idea....
Just make sure you keep the pump above the tank otherwise you run the chance of sucking fluid into the pump. You can also flick the hose in the tank to see if more bubbles come out. If when you flick no more bubbles come out...you are done.
I replaced the master and slave this weekend.....
Using the mitivac it took about 2 hours
Here's what I did.....it works....but takes time....be patient...it takes longer than bleeding brakes.
fill tank...
put in pump with attachment...
Pump up to 20hg...
Walk away for about 5 minutes.
Pump pedal very slowly twice...
Release pressure from pump....remove then reinsert....pump back up to 20hg....
Walk away for about 5 minutes....
Repeat...
You get the idea....
Just make sure you keep the pump above the tank otherwise you run the chance of sucking fluid into the pump. You can also flick the hose in the tank to see if more bubbles come out. If when you flick no more bubbles come out...you are done.
09-18-2006, 12:37 PM
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thanks for the post, I will have to pick up a mitti vac or put more time into bleeding it the manual way.
now I just need to figure out why it keeps eating slave cylinders
now I just need to figure out why it keeps eating slave cylinders
